op chicago



March 25, 1930. J. L. BREESE, JR 1,751,973

CLOSURE FOR USE WITH BURNER UNITS Original Filed Nov. 1'7, 1927 2Sheets-Sheet l March 25, 1930. J BREESE, JR 1,751,973

CLOSURE FOR USE WITH BURNER UNITS Original Filed Nov. 17, 1927 2Sheets-Sheet 2 Patented Mar. 25, 1930 UNITED STATES PATENT OFFICE JAMESL. BREESE, JR., OF CHICAGO, ILLINOIS, ASSIGNOR T OIL DEVICESCORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS CLOSURE FORUSE WITH BURNER UNITS Original application filed November 17, 1927,Serial No. 233,787. Divided and this application filed March 14, 1928.Serial No. 261,465.

My invention relates to a closure for doors for furnaces, boilers andthe like, which is particularly useful for use with hydrocarbon orliquid or gaseous fuel burning units. One object of my invention is toprovide means for sealing off the air in the ashpit door'when a heatingunit of the type herein described and shown is inserted through saiddoor. Another object is the provision of .10 means for applying aheating unit of the type described to a furnace or the like without thenecessity of bricking up or otherwise permanently modifying the furnaceor the door. Other objects will, appear from time to time in the courseof the specification and claims.

The present application is a division of my copending application No.233,787, filed on November 17, 1927, for hydrocarbon burner.

I illustrate the invention more or less d1agrammatically in theaccompanying drawings, wherein- Figure 1 is a vertical sectionthroughafurnace and heating unit with the door n position;

Figure 2 is a section on the line 22 of Figure 1, showing the door inposltlon; and

Figure 3 is a perspective view of the furnace with'the heating unitabout to be 1nserted and the door removed.

Like parts are indicated by like symbols throughout the specificationand drawlngs.

A generally indicates a heater of a well known type having the usualsupporting legs A a flue escape pipe A and a fire box door A". p

B indicates a fuel supply and heater unlt having a combustion member BThe latter includes a bottom portion B resting upon the I 40 bottom ofthe ash pit A of the heater A, and provided with the upwardly projectinggenerally cylindrical wall B in communication \with which is thelongitudinal air inlet passage B, which is braced by the member B to thewall B Said wall may be provided with indentations B for clearing thelugs A or other projections inside the ash pit opening.

Seated upon the upper edge of said wall is a mixing chamber having thebottom portion C which may be concave as shown and the upwardlyprojecting cylindrical side wall G which may be made of two parts C Csecured together by the crimp C. C are a plurality of large and smallapertures penetrating the upper part C of the wall, permitting air toenter the mixing chamber. Exteriorl projecting from the wall is acircular ange C with a downwardly projecting ring 0 adapted to be seatedupon the upper edge of the drum B C is a conic shaped split ringpositioned in the circular depression or groove C in the wall C.

-D generally indicates a fuel passage extending from the fuel tank basemember D with its tank D and float D to the elbow D through which thefuel is supplied to the interior of the shell C D indicates any suitablevalve for controlling the flow of the fuel and D adjustable supports forthe fuel tank, with the members D screwthreaded thereto and the lockingscrews D.

It will be realized that whereas I have described a practical andoperative heating unit, my ash pit door closure may be employed with awide variety of heating units, or may even have uses entirelydissociated with any such heating unit.

Referring to the drawings it will be seen that the usual ash pit door ofthe heater A has been removed and has been replaced by the closure plateH cut away as at H to conform to the shape of the laterally projectingair passage B. H is a locking member, hinged as at H to the usual pin Hprovided for the ash pit door. H H are spring members mounted on themember H adapted for frictional engagement with the plate H, pres surebeing applied by means of the screwthreaded stud H mounted in the heaterA and penetrating the loclcing member H and shown a practical andoperative device, nevertheless many changes might be made in size,shape, number and distribution of parts without departing from thespirit of my invention. 1 therefore wish my drawings and description tobe taken as in a broad sense illustrative or diagrammatic rather than aslimiting me to my specific description and showing. The use, andoperation of my invention are as follows:

lhe heater unit herein shown may be applied to any heater, for example acoal burning heater, by merely lifting off the ash pit door and removingthe grates and inserting 1 the mixingchamben This ready conversion of acoal burning plant to an oil burning plant is of great importance.

in order to prevent the inflow of air through the grate door, the gratedoor being removed,I provide the structure shown in detail in Figures 2and 3 which includes the plate H, cut away as at H to conform to the airpassage Bi, upon which it may rest. In order to hold it against theedges of the grate door I provide vertical ring arms H which are,secured to the transverse strip H one end of which. is hinged to thenormal pivot pin H of the ash pit door, whereas the other is secured atthe opposite side ofthe door, for

example by the screwthreaded stu'd H and the wing nut H. The result is aconstant yielding pressure against the closure member H, which keeps ittightly sealed in place the pressure being applied particularly to thefour corners of the plate. a L

I claim: 1. A closure forthe door opening to the ash pit of a furnacecomprising-a free 010-' sure plate shaped to permit the passage of afuel conduit and closely fitting the same and adapted to be appliedover-the said openin and hinged means arranged to yieldingly hofil theclosure plate in place, movable inde- X1 pendently of the plate andarranged to be swung into holdingengagement therewitlr after the samehas been applied.

extending across the central portion of the closure plate when thelatter is in place, leaf springs secured at their central portions tothe cross bar near its ends, the free ends of such springs beingarranged to bear against the closure plate at its corner portions, andmeans for securing the free end of the cross bar with the springs inholding engagement with the closure plate. A

Signed at Chicago county of Cook and State of Illinois, this 8th day ofMarch, 1928.

JAMES L. BREE-SE, JR.

2. A "closure for the door opening to the ash pit of a furnace adaptedto replace the usual ash pit door, comprising a freeplate,

conforming generally. to the said ,opening and constructedto permit thepassage of, a fuel supply conduit into the ash pit and to fit closelyover the same, a transverse bar hinged at one end toone side of theopening and

